Java Regex：严格匹配内部块中两个字符串之间的文本

Question

I need a regex which matches between two strings but takes the inner block only. I tried using reluctant quantifier but it did not work.

Here is an example:

<div>
    Hi
</div>
<div class = "quote">
    This is mail.
    <hr tabindex="-1">
    <div color="r">
        <b>From:</b>xyz<br>
        <b>Sent:</b>xyz PM<br>
        <b>To:</b>xyz<br><br>
    </div>
</div>

I used this regex but it did not work (with DOTALL matching, so that "." matches newline as well)

<div.*(From:.*Sent:.*To:.*)*?</div>

Above regex is matching everything since the input text starts with <div> and ends with </div> , but I need the just above and below the pattern specified inside the bracket.

So I need the output to be:

<div color="r">
        <b>From:</b>xyz<br>
        <b>Sent:</b>xyz PM<br>
        <b>To:</b>xyz<br><br>
</div>

Thanks in advance..

Answer 1

It is not recommended to parse HTML using regex.

If you know what you're doing then you can use following String#replaceAll call:

html.replaceAll
           ("(?i)(?s).*?(<div\\s*color.*?From:.*?Sent:.*?To:.*?</div>).*", "$1");

Answer 2

Try this. I'm expanding on my comment so you'll see what I mean:

  public String findText(String htmlString) {
    Pattern patt = Pattern.compile("<div.*</div>");
      Matcher m = patt.matcher(htmlString);
      while (m.find()) {
        String text = m.group(1);
        // check whether the value of text is the div you want
        if (text.indexOf("color") < text.indexOf(">")) { //... or something similar
           return (text);
        }
      }
    return null;
   }